From e2a8296131e94ad785f5564156ed2db1fdb2e080 Mon Sep 17 00:00:00 2001 From: Coleman Kane Date: Sat, 20 Mar 2021 00:00:59 -0400 Subject: Linux 5.12 compat: idmapped mounts In Linux 5.12, the filesystem API was modified to support ipmapped mounts by adding a "struct user_namespace *" parameter to a number functions and VFS handlers. This change adds the needed autoconf macros to detect the new interfaces and updates the code appropriately. This change does not add support for idmapped mounts, instead it preserves the existing behavior by passing the initial user namespace where needed. A subsequent commit will be required to add support for idmapped mounted. Reviewed-by: Tony Hutter Reviewed-by: Brian Behlendorf Co-authored-by: Brian Behlendorf Signed-off-by: Coleman Kane Closes #11712 --- config/kernel-xattr-handler.m4 | 78 ++++++++++++++++++++++++++++-------------- 1 file changed, 53 insertions(+), 25 deletions(-) (limited to 'config/kernel-xattr-handler.m4') diff --git a/config/kernel-xattr-handler.m4 b/config/kernel-xattr-handler.m4 index 137bf4a8a..00b1e74a9 100644 --- a/config/kernel-xattr-handler.m4 +++ b/config/kernel-xattr-handler.m4 @@ -152,6 +152,21 @@ dnl # dnl # Supported xattr handler set() interfaces checked newest to oldest. dnl # AC_DEFUN([ZFS_AC_KERNEL_SRC_XATTR_HANDLER_SET], [ + ZFS_LINUX_TEST_SRC([xattr_handler_set_userns], [ + #include + + int set(const struct xattr_handler *handler, + struct user_namespace *mnt_userns, + struct dentry *dentry, struct inode *inode, + const char *name, const void *buffer, + size_t size, int flags) + { return 0; } + static const struct xattr_handler + xops __attribute__ ((unused)) = { + .set = set, + }; + ],[]) + ZFS_LINUX_TEST_SRC([xattr_handler_set_dentry_inode], [ #include @@ -194,45 +209,58 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_XATTR_HANDLER_SET], [ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_SET], [ dnl # - dnl # 4.7 API change, - dnl # The xattr_handler->set() callback was changed to take both - dnl # dentry and inode. + dnl # 5.12 API change, + dnl # The xattr_handler->set() callback was changed to 8 arguments, and + dnl # struct user_namespace* was inserted as arg #2 dnl # - AC_MSG_CHECKING([whether xattr_handler->set() wants dentry and inode]) - ZFS_LINUX_TEST_RESULT([xattr_handler_set_dentry_inode], [ + AC_MSG_CHECKING([whether xattr_handler->set() wants dentry, inode, and user_namespace]) + ZFS_LINUX_TEST_RESULT([xattr_handler_set_userns], [ AC_MSG_RESULT(yes) - AC_DEFINE(HAVE_XATTR_SET_DENTRY_INODE, 1, - [xattr_handler->set() wants both dentry and inode]) + AC_DEFINE(HAVE_XATTR_SET_USERNS, 1, + [xattr_handler->set() takes user_namespace]) ],[ dnl # - dnl # 4.4 API change, - dnl # The xattr_handler->set() callback was changed to take a - dnl # xattr_handler, and handler_flags argument was removed and - dnl # should be accessed by handler->flags. + dnl # 4.7 API change, + dnl # The xattr_handler->set() callback was changed to take both + dnl # dentry and inode. dnl # AC_MSG_RESULT(no) - AC_MSG_CHECKING( - [whether xattr_handler->set() wants xattr_handler]) - ZFS_LINUX_TEST_RESULT([xattr_handler_set_xattr_handler], [ + AC_MSG_CHECKING([whether xattr_handler->set() wants dentry and inode]) + ZFS_LINUX_TEST_RESULT([xattr_handler_set_dentry_inode], [ AC_MSG_RESULT(yes) - AC_DEFINE(HAVE_XATTR_SET_HANDLER, 1, - [xattr_handler->set() wants xattr_handler]) + AC_DEFINE(HAVE_XATTR_SET_DENTRY_INODE, 1, + [xattr_handler->set() wants both dentry and inode]) ],[ dnl # - dnl # 2.6.33 API change, - dnl # The xattr_handler->set() callback was changed - dnl # to take a dentry instead of an inode, and a - dnl # handler_flags argument was added. + dnl # 4.4 API change, + dnl # The xattr_handler->set() callback was changed to take a + dnl # xattr_handler, and handler_flags argument was removed and + dnl # should be accessed by handler->flags. dnl # AC_MSG_RESULT(no) AC_MSG_CHECKING( - [whether xattr_handler->set() wants dentry]) - ZFS_LINUX_TEST_RESULT([xattr_handler_set_dentry], [ + [whether xattr_handler->set() wants xattr_handler]) + ZFS_LINUX_TEST_RESULT([xattr_handler_set_xattr_handler], [ AC_MSG_RESULT(yes) - AC_DEFINE(HAVE_XATTR_SET_DENTRY, 1, - [xattr_handler->set() wants dentry]) + AC_DEFINE(HAVE_XATTR_SET_HANDLER, 1, + [xattr_handler->set() wants xattr_handler]) ],[ - ZFS_LINUX_TEST_ERROR([xattr set()]) + dnl # + dnl # 2.6.33 API change, + dnl # The xattr_handler->set() callback was changed + dnl # to take a dentry instead of an inode, and a + dnl # handler_flags argument was added. + dnl # + AC_MSG_RESULT(no) + AC_MSG_CHECKING( + [whether xattr_handler->set() wants dentry]) + ZFS_LINUX_TEST_RESULT([xattr_handler_set_dentry], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_XATTR_SET_DENTRY, 1, + [xattr_handler->set() wants dentry]) + ],[ + ZFS_LINUX_TEST_ERROR([xattr set()]) + ]) ]) ]) ]) -- cgit v1.2.3